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| Hi I am new to robotics and python; I have just started wit this kit (rasptank) and ran into this error at step 3.6  . 
 Bellow you will see the error, any help or advice would be amazing
    
 
 Starting camera thread.
 select timeout
 Exception in thread Thread-3:
 Traceback (most recent call last):
 File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner
 self.run()
 File "/usr/lib/python3.7/threading.py", line 865, in run
 self._target(*self._args, **self._kwargs)
 File "/home/pi/adeept_rasptank/server/base_camera.py", line 94, in _thread
 for frame in frames_iterator:
 File "/home/pi/adeept_rasptank/server/camera_opencv.py", line 436, in frames
 if ImgIsNone == 0:
 UnboundLocalError: local variable 'ImgIsNone' referenced before assignment
 
 
 
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